Oh yeah, A roof would be the way to go. But retractable or not?Yeah, it's pretty much a sure deal that the new stadium is gonna have a roof.
Edit: Apparently the A's are going to play at the Aviators' ballpark (which, interestingly, has no naming rights, it's just called Las Vegas Ballpark) until the new stadium is completed. Linky
Drew Smyly loses a perfect game (against the Dodgers) in the 8th on the "Pittsburgh Pirates Special" Maybe they don't throw the runner out anyway, but damn.